Report: Hawaii to test nuclear sirens for 1st time since Cold War

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In this undated photo provided on Tuesday, Nov. 21, 2017, by the North Korean government, North Korean leader Kim Jong Un visits the the Sungri Motor Complex in Pyeongannam-do, North Korea. The Trump administration is due to announce new sanctions on North Korea on Tuesday, Nov. 21, 2017, after declaring it a state sponsor of terrorism in the latest push to isolate the pariah nation. Independent journalists were not given access to cover the event depicted in this image distributed by the North Korean government. The content of this image is as provided and cannot be independently verified. Korean language watermark on image as provided by source reads: 'KCNA' which is the abbreviation for Korean Central News Agency. (Korean Central News Agency/Korea News Service via AP)

Starting Friday, the state will begin the monthly tests, which will be part of the overall test of the statewide warning siren system, the report said, citing the Hawaii Emergency Management Agency.

At 11:45 a.m. on the first business day of each month, a steady alert signal will sound from speakers for 50 seconds, which will then be followed by a 10-second pause and then an “attack warning” signal for 50 seconds, CNN reported.

Hawaii sits about 4,600 miles from North Korea and CNN reported the state would have about a 20-minute heads up before a missile launched by Kim Jong Un’s regime would strike the U.S. islands.

The tests will follow the latest missile launch by North Korea, which was reported to have happened Tuesday, according to multiple media reports.